This is really cool! I can see myself using this in the future.
I think an option to change the background's color would be good, since I uploaded a sprite that was mostly black and could barely see it.
It also took me some time to realize I could resize the sprites.
Other than that, everything works well and it was intuitive to use :)
Viewing post in Sprite Combinator jam comments
Thanks a lot! a background change makes sense, I'll definitely do that!
Thinking about it, resizing is a subtle feature, I should make it more obvious.
And thanks for the comment on intuitivity; I tried to make it so, but there's a lot in there. still wish I had the time to give a bit more instructions.